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Flashcards in Types of Glaciers Deck (28)
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1

Glaciers are classified as...

semi-permanent bodies of ice

2

How are glaciers formed?

from the compaction and recrystallization of snow

3

Glaciers build up by the gradual accumulation of ____ over ____.

snow, time

4

What happens as snow builds up?

As the snow accumulates, the overlying layers of snow places a lot of pressure on the underlying layers and squeeze the snowflakes into small ice crystals

5

Snowflakes are squeezed so much that glacier ice becomes _______ to air.

impermeable

6

What are the five types of glaciers?

- Cirque glacier

- Valley glacier

- Ice cap

- Fjord glacier

- Piedmont glacier

7

Where do Cirque glaciers form?

In bowl-shaped depressions

8

What do valley glaciers fill?

valleys

9

_____ are small glaciers at the top of mountains.

ice caps

10

_____ glaciers empty into narrow bodies of water

Fjord

11

Piedmont glaciers spread out into large ______ areas

planar

12

Cirque glaciers are often the starting point for ______ glaciers

valley -

 

so if cirque glaciers spill out of their bowl into a valley then they become a valley glacier

13

What do valley glaciers create?

U-shaped valleys

14

What are valley glaciers surrounded by?

Bedrock and slopes that are not covered with ice

15

If a valley glacier flows into a body of water is considered to be a _____ glacier

Fjord

16

What do Fjord glaciers create?

numerous icebergs as the ice breaks off and floats away in the water

17

How are the bodies of water and the glaciers that fall into them formed?

by some land upheaval.

18

a _______ glacier is a glacier that has spread beyond its valley and covers a large,____ area

Piedmont, flat

19

Where are Piedmont glaciers?

they cover large flat areas

20

Continent-sized glacial surfaces are called ______ ______

ice sheets

21

What are the two Ice sheets currently in the world?

antartica and Greenland.

22

Ice sheets are very sensitive to...

global climate change

- they expand and contract in response to global climate

23

What do ice sheets contain?

a number of ice shelves

24

what are ice shelves?

-thick floating sheets of ice on top of water

25

what can ice sheets produce?

a number of ice bergs that can float away in the water

26

_____ ice is floating ice not attached to a glacier

sea

27

What is sea ice?

floating ice not attached to a glacier

- no land underneath it

28

how does sea ice form?

formed by freezing sea water